Electrical glow-light with second-class conductors.



Patented lune 5, |900.

K. DCHS.

ELECTRICAL GLOW LIGHT WITH SECUND CLASS'CUNDUCTRS.

(Application filed Sept. 16, 1899.)

(No Model.)

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UNITED STATES PATENT OFFICE..

KARL ocHs, or BERLIN, GERMANY.

ELECTRICAL GLOW-LIGHT WITH SECOND-CLASS CONDUCTORS.

SPECIFICATION forming part of Letters Patent No. 650,905, dated June 5, 1900.

Application filed September 16, 1899. Serial No. 730,663. (No model.)

To aZZ whom it may concern:

Be it known that I, KARL OOHS, a subject of the Emperor of Germany, residing at Berlin, Germany, have invented certain new and useful Improvements in Electrical Glow- Lights with Second Class Conductors, of which the following is a specification.

This invention relates to improvements in electric lamps with illuminating-bodies composed) of second class conductors, (electrolytes.

The object of this invention is lto produce an electric lamp composed of a base with an incandescent body and lamp-holder, the illuminating bodies or filaments being made of what are termed second-class conductors. The lamp is supplied with a heating body or coil, which is arranged near the illuminating body or lament and lserves for preliminarily heating the same in order that it may act to conduct the current, thereby becoming a conductor and affording illumination. The current necessary for the heating of the heating or exciting body is automatically interrupted after the illuminating-body has become a fairly-good conductor of the current. Hence arises the necessity of there being at least three pairs of contacts between the base and the lamp-holder.

Figures l and 2 of the accompanying drawings illustrate tWo forms of such a lamp.

The essential parts of the invention are the lamp-holder and the lamp. The lamp-base d is furnished with the spring contact rods or pins b c, Fig. 2, and the contact tube or socket d, which latter serves at the same time for purposes of ventilation. These contacts correspond, respectively, with the tubes or sockets f g, seated in the recessed partition e of the socket or lamp-holder, and with the core i, furnished with a contact-plate h and sliding in the solenoid k. The lateral channels or passages Z in the partition e of the socket and the openings m in` the casing al low of ventilation in the direction of the arrows. The air traversing the lamp and the through the winding 7c of the solenoid to the return-wire q. The solenoid now becomes excited and the contact d h is broken.

In the form illustrated in Fig. l the socketcontacts b f and c g of Fig. 2 are replaced by the device r s, having a bayonet-catch and the spring-piston u, with contact-plates suited to the same or corresponding therewith. The current connections are the same as in Fig. 2, and the lamp also acts in the same manner.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. In a lamp structure the combination of a lamp having a glower and a heater, of a lamp-socket provided with a partition e dividin g the socket into two chambers, the said partition having air-openings therethrough and automatic means carried by the said partition for controlling the said air-openings whereby the air-circulating system of the lamp may be controlled.

2. An incandescent lamp provided with a glower and a heater and air-circulating system and a plurality of sliding contacts Whereby the said lamp may be so seated in a socket as to conform itself to the device carried by the socket for controlling the air-circulating system.

KARL OCI-IS. Witnesses:

HENRY HAsPER, v WOLDEMAR HAUPT. 

